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EndsemMay 20242019 patternTE Mech

Heat & Mass Transfer (HMT) SPPU Endsem Question Paper May 2024

All 8 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated HMT questions
Subject code
302042
Pattern
2019 pattern
Exam
Endsem
Session
May 2024
Max. marks
70
Time
2½ Hours
Semester
I
Paper code
[6262]-163

Printed for: T.E. (Mechanical Engineering)/(Mechanical Sandwich Engineering)

Instructions to the candidates

  1. Answer Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6, Q.7 or Q.8.
  2. Neat diagrams must be drawn wherever necessary
  3. Figures to the right indicate full marks.
  4. Assume suitable data wherever necessary.

Questions

  1. Q1

    1. a)

      Explain the following Non dimensional numbers i) Reynold Number, ii) Grashoff Number iii) Nusselt Number

      Also asked:May 2023

      [9]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [9]

  2. Q2

    1. a)

      Explain in short Critical Heat Flux.

      [4]
    2. b)

      Differentiate between filmwise and dropwise condensation.

      Also asked:May 2023

      [4]
    3. c)

      This part has equations that don’t show as text. Open the PDF to read it.

      [10]

  3. Q3

    1. a)

      Write Note on radiation shield.

      [5]
    2. b)

      Calculate the net radiant heat exchange per m 2 area for two large parallel plates at temperatures 427°C and 27°C respectively ε (hot plate) = 0.9 and ε (cold plate) = 0.6. If a polished aluminium shield is placed between them, find the percentage reduction in the heat transfer, ε (shield) = 0.4.

      [12]

  4. Q4

    1. a)

      Explain the following i) Black Body ii) Wien’s displacement law iii) Kirchhoff ‘s law iv) Solid angle

      [8]
    2. b)

      Calculate the shape factor F12 and F21 for the following geometries i) Sphere of diameter D inside a cubical box of length D ii) Diagonal partition within a long square duct

      [9]

  5. Q5

    1. a)

      Enumerate applications of mass transfer.

      Also asked:May 2023

      [4]
    2. b)

      Explain the mode of mass transfer.

      Also asked:May 2023

      [4]
    3. c)

      This part has equations that don’t show as text. Open the PDF to read it.

      [10]

  6. Q6

    1. a)

      State and explain Fick’s law for mass diffusion.

      Also asked:Nov 2025 ·Nov 2023 ·May 2023 ·Jul 2022

      [8]
    2. b)

      Write the Mass Diffusion Equations in Cartesian, Cylindrical and Spherical Coordinate system.

      [6]
    3. c)

      Explain the following term i) mass concentration ii) molar concentration

      [4]

  7. Q7

    1. a)

      Derive an expression for LMTD of a counter flow heat exchanger.

      Also asked:Nov 2025 ·Nov 2023 ·May 2023 ·Jul 2022

      [8]
    2. b)

      Determine the area required in parallel flow heat exchanger to cool oil from 60°C to 30°C using water available at 20°C. The outlet temperature of the water is 26°C. The rate of flow of oil is 10 kg/s. The specific heat of the oil is 2200 J/kg K. The overall heat transfer coefficient U = 300 W/m 2 K.

      [9]

  8. Q8

    1. a)

      Derive Expression for effectiveness of parallel flow heat exchanger in terms of NTU and capacity ratio.

      Also asked:Nov 2025 ·May 2023

      [8]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [9]